Iomys horsfieldi (Waterhouse, 1838) Proc. Zool. Soc. Lond., 1837:87 [1838].
TYPE LOCALITY: "Either from Java or Sumatra." Restricted by Chasen (1940:114) to Sumatra .
DISTRIBUTION: Malay Peninsula to Java; Borneo.
SYNONYMS: davisoni (Thomas, 1886); everetti (G. Allen and Coolidge, 1940, not Thomas, 1895); lepidus Lyon, 1911 (not Horsfield, 1824); penangensis Chasen, 1940; thomsoni Thomas, 1900.
COMMENTS: Formerly included sipora and winstoni (Corbet and Hill, 1980, 1986).